There are different types of interviews. Some are done live as on a radio show, vlog, or TV spot. It might even be done via Google hangout. These can be really effective as it affects both the auditory reader and the visual one.
The written interview is the most common. Typically, the one interviewing will email the author a list of questions. Some are generic and others could be clearly written just for you. As an author, you need to respond in a clear and not too short methods. Do not answer with just one word or one small sentence. You’re a writer. Show them how talented you really are. Be funny. Be creative. Be mysterious. Be yourself.
Character interviews are the most fun. It is where a character is chosen. The interviewer tailors questions directed specifically at the character. The author is to answer as though the character is. That means the tone, the word usage, and everything needs to be as though the character was real and responding to the questions.
Interviews give readers a chance to see you in a slightly different light. They enjoy interesting answers. They enjoy hearing ‘secrets’. It is a great marketing tool, but keep in mind that most readers aren’t going to read an interview unless they are already a fan of the author. The key is to have such a great interview that they share it with those who have not read your work. By doing that, the new person gets interested. Take advantage of that and write really good interview answers.
You can have interviews almost anywhere. The most common are blogs and websites targeted toward readers. Try a local newspaper writer to see if they would be interested.